In our old house we had a utility room so the litter tray lived in there. Now we've moved and have got an open plan downstairs so we've put it in the spare room/office but I'm working in there now and dcat is reluctant to use the tray while I'm in there during the day.
She's a self-imposed indoor cat, has never enjoyed going outside. We have space in the bathroom but DH thinks that's disgusting - I have no idea why, we shit in there so why can't the cat?